Unfortunately they are not working for me with 480s. Using these, the gpus show up in device manager but 10 or so seconds after I open my miner (claymore), the program crashes, the drivers crash, or they start mining but with some gpus at 0mhs.

I've tried powering them with only 6pin, only molex, and both 6pin and molex (since they have both connectors). My other risers (old molex powered ribbon risers and new usb powered risers) do not have any of these problems

I bought some of the 6pin powered risers from holybtc, will try them soon

Why are you using positive offset instead of just keeping core voltage higher? Also why not dual mine and why not lower clocks and voltages more for more efficiency?

With bios mods and proper undervolting and overclocking mem, I think they get about the same mhs per power consumption

Neither of these pages will load for me, will you or someone that got it to load share an alternate link?

With modded bios, undervolted/underclocked core, and overclocked mem, it seems both my 470s and 480s get about the same hashrate per power consumption. With both 470 and 480, it seems the hashrate per power consumption is slightly higher when dual mining eth + sia




With 95w at the wall, what are you figuring as the system wattage? And what is your VDDC for your gpu? have you compared the hashrate per powerconsumption when dualmining to eth only?

Nice hashrate per gpuz power consumption 29.7mhs/65w! A bit better than my hashrate per gpuz power on my 470s which was about .43 (which are better than my 480s lol, although i calculate it by figuring how much sia hashrate equals 1 eth mhs and adding the total eth+sia.. didn't factor in the extra 1% dev fee tho)

Are you thinking of releasing that rom to the public or only selling it? I am mostly interested in the memory strap timing as I can manually tweak my own core voltage/clock/offset at this point

I noticed that message too. Seems 256k is the right size.. check out the size of other 470 (or even 480) roms available to compare the size

reference sapphire 470 4gb modded rom with the 1500memory strap timing set to 1625, 1750, and 2000:  http://www.megafileupload.com/k2gu/470_4gb_sapphire_modded_bios.rom

I use -12.5% (1065)/850mv core and 2000/850mv mem for high mhs and power efficiency